Linux Audio

Check our new training course

Embedded Linux Audio

Check our new training course
with Creative Commons CC-BY-SA
lecture materials

Bootlin logo

Elixir Cross Referencer

Open Menu / kernel / uid16.c
Loading...
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
/*
 *	Wrapper functions for 16bit uid back compatibility. All nicely tied
 *	together in the faint hope we can take the out in five years time.
 */

#include <linux/mm.h>
#include <linux/utsname.h>
#include <linux/mman.h>
#include <linux/smp_lock.h>
#include <linux/notifier.h>
#include <linux/reboot.h>
#include <linux/prctl.h>
#include <linux/init.h>
#include <linux/highuid.h>

#include <asm/uaccess.h>

extern asmlinkage long sys_chown(const char *, uid_t,gid_t);
extern asmlinkage long sys_lchown(const char *, uid_t,gid_t);
extern asmlinkage long sys_fchown(unsigned int, uid_t,gid_t);
extern asmlinkage long sys_setregid(gid_t, gid_t);
extern asmlinkage long sys_setgid(gid_t);
extern asmlinkage long sys_setreuid(uid_t, uid_t);
extern asmlinkage long sys_setuid(uid_t);
extern asmlinkage long sys_setresuid(uid_t, uid_t, uid_t);
extern asmlinkage long sys_setresgid(gid_t, gid_t, gid_t);
extern asmlinkage long sys_setfsuid(uid_t);
extern asmlinkage long sys_setfsgid(gid_t);
 
asmlinkage long sys_chown16(const char * filename, old_uid_t user, old_gid_t group)
{
	return sys_chown(filename, low2highuid(user), low2highgid(group));
}

asmlinkage long sys_lchown16(const char * filename, old_uid_t user, old_gid_t group)
{
	return sys_lchown(filename, low2highuid(user), low2highgid(group));
}

asmlinkage long sys_fchown16(unsigned int fd, old_uid_t user, old_gid_t group)
{
	return sys_fchown(fd, low2highuid(user), low2highgid(group));
}

asmlinkage long sys_setregid16(old_gid_t rgid, old_gid_t egid)
{
	return sys_setregid(low2highgid(rgid), low2highgid(egid));
}

asmlinkage long sys_setgid16(old_gid_t gid)
{
	return sys_setgid((gid_t)gid);
}

asmlinkage long sys_setreuid16(old_uid_t ruid, old_uid_t euid)
{
	return sys_setreuid(low2highuid(ruid), low2highuid(euid));
}

asmlinkage long sys_setuid16(old_uid_t uid)
{
	return sys_setuid((uid_t)uid);
}

asmlinkage long sys_setresuid16(old_uid_t ruid, old_uid_t euid, old_uid_t suid)
{
	return sys_setresuid(low2highuid(ruid), low2highuid(euid),
		low2highuid(suid));
}

asmlinkage long sys_getresuid16(old_uid_t *ruid, old_uid_t *euid, old_uid_t *suid)
{
	int retval;

	if (!(retval = put_user(high2lowuid(current->uid), ruid)) &&
	    !(retval = put_user(high2lowuid(current->euid), euid)))
		retval = put_user(high2lowuid(current->suid), suid);

	return retval;
}

asmlinkage long sys_setresgid16(old_gid_t rgid, old_gid_t egid, old_gid_t sgid)
{
	return sys_setresgid(low2highgid(rgid), low2highgid(egid),
		low2highgid(sgid));
}

asmlinkage long sys_getresgid16(old_gid_t *rgid, old_gid_t *egid, old_gid_t *sgid)
{
	int retval;

	if (!(retval = put_user(high2lowgid(current->gid), rgid)) &&
	    !(retval = put_user(high2lowgid(current->egid), egid)))
		retval = put_user(high2lowgid(current->sgid), sgid);

	return retval;
}

asmlinkage long sys_setfsuid16(old_uid_t uid)
{
	return sys_setfsuid((uid_t)uid);
}

asmlinkage long sys_setfsgid16(old_gid_t gid)
{
	return sys_setfsgid((gid_t)gid);
}

asmlinkage long sys_getgroups16(int gidsetsize, old_gid_t *grouplist)
{
	old_gid_t groups[NGROUPS];
	int i,j;

	if (gidsetsize < 0)
		return -EINVAL;
	i = current->ngroups;
	if (gidsetsize) {
		if (i > gidsetsize)
			return -EINVAL;
		for(j=0;j<i;j++)
			groups[j] = current->groups[j];
		if (copy_to_user(grouplist, groups, sizeof(old_gid_t)*i))
			return -EFAULT;
	}
	return i;
}

asmlinkage long sys_setgroups16(int gidsetsize, old_gid_t *grouplist)
{
	old_gid_t groups[NGROUPS];
	int i;

	if (!capable(CAP_SETGID))
		return -EPERM;
	if ((unsigned) gidsetsize > NGROUPS)
		return -EINVAL;
	if (copy_from_user(groups, grouplist, gidsetsize * sizeof(old_gid_t)))
		return -EFAULT;
	for (i = 0 ; i < gidsetsize ; i++)
		current->groups[i] = (gid_t)groups[i];
	current->ngroups = gidsetsize;
	return 0;
}

asmlinkage long sys_getuid16(void)
{
	return high2lowuid(current->uid);
}

asmlinkage long sys_geteuid16(void)
{
	return high2lowuid(current->euid);
}

asmlinkage long sys_getgid16(void)
{
	return high2lowgid(current->gid);
}

asmlinkage long sys_getegid16(void)
{
	return high2lowgid(current->egid);
}